Statement of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statement of Income and Comprehensive Income [Abstract]
Net income	$ 57	$ 49	$ 108	$ 117
Other comprehensive loss:
Foreign currency translation adjustments, net of tax	(85)	(29)	(32)	(154)
Other comprehensive loss	(85)	(29)	(32)	(154)
Comprehensive (loss) income	$ (28)	$ 20	$ 76	$ (37)